1 // Raw screen writing code.
3 // Copyright (C) 2008 Kevin O'Connor <kevin@koconnor.net>
5 // This file may be distributed under the terms of the GNU GPLv3 license.
7 #include <stdarg.h> // va_list
9 #include "farptr.h" // GET_VAR
10 #include "util.h" // printf
11 #include "biosvar.h" // struct bregs
17 memset(&br, 0, sizeof(br));
20 call16_int(0x10, &br);
23 // Write a charcter to the framebuffer.
25 putc(u16 action, char c)
27 if (CONFIG_DEBUG_SERIAL)
28 // Send character to serial port.
31 // Send character to debug port.
32 outb(c, PORT_BIOS_DEBUG);
35 // Send character to video screen.
42 // Write a string to the framebuffer.
44 puts(u16 action, const char *s)
50 // Write a string to the framebuffer.
52 puts_cs(u16 action, const char *s)
55 char c = GET_VAR(CS, *(u8*)s);
62 // Write an unsigned integer to the screen.
64 putuint(u16 action, u32 val)
67 char *d = &buf[sizeof(buf) - 1];
70 *d = (val % 10) + '0';
79 // Write a single digit hex character to the screen.
81 putsinglehex(u16 action, u32 val)
90 // Write an integer in hexadecimal to the screen.
92 puthex(u16 action, u32 val)
94 putsinglehex(action, (val >> 28) & 0xf);
95 putsinglehex(action, (val >> 24) & 0xf);
96 putsinglehex(action, (val >> 20) & 0xf);
97 putsinglehex(action, (val >> 16) & 0xf);
98 putsinglehex(action, (val >> 12) & 0xf);
99 putsinglehex(action, (val >> 8) & 0xf);
100 putsinglehex(action, (val >> 4) & 0xf);
101 putsinglehex(action, (val >> 0) & 0xf);
111 bvprintf(u16 action, const char *fmt, va_list args)
115 char c = GET_VAR(CS, *(u8*)s);
124 c = GET_VAR(CS, *(u8*)n);
130 // Ignore long format indicator
132 c = GET_VAR(CS, *(u8*)n);
141 val = va_arg(args, s32);
146 putuint(action, val);
149 val = va_arg(args, s32);
150 putuint(action, val);
154 val = va_arg(args, s32);
158 val = va_arg(args, int);
162 // Hack to support "%.s" - meaning string on stack.
163 if (GET_VAR(CS, *(u8*)(n+1)) != 's')
166 sarg = va_arg(args, const char *);
170 sarg = va_arg(args, const char *);
171 puts_cs(action, sarg);
182 BX_PANIC(const char *fmt, ...)
186 bvprintf(0, fmt, args);
189 // XXX - use PANIC PORT.
196 BX_INFO(const char *fmt, ...)
200 bvprintf(0, fmt, args);
205 printf(const char *fmt, ...)
209 bvprintf(1, fmt, args);
214 dump_regs(const char *fname, const char *type, struct bregs *regs)
217 BX_INFO("%s %s: NULL\n", type, fname);
220 BX_INFO("%s %s: a=%x b=%x c=%x d=%x si=%x di=%x\n"
221 , type, fname, regs->eax, regs->ebx, regs->ecx, regs->edx
222 , regs->esi, regs->edi);
223 BX_INFO(" ds=%x es=%x ip=%x cs=%x f=%x r=%p\n"
224 , regs->ds, regs->es, regs->ip, regs->cs, regs->flags, regs);
228 __debug_isr(const char *fname)
234 // Function called on handler startup.
236 __debug_enter(const char *fname, struct bregs *regs)
238 // XXX - implement run time suppression test
239 dump_regs(fname, "enter", regs);
243 __debug_fail(const char *fname, struct bregs *regs)
245 dump_regs(fname, "fail", regs);
249 __debug_stub(const char *fname, struct bregs *regs)
251 dump_regs(fname, "stub", regs);